Fountain-pen.



No. 815,218.1 PATENTED MAB.. 13, 1906.

` J. R. ROBINSON.'

FOUNTAIN PEN.

APPLICATION FILED SEPT. 13, 1905.

1 K BKEG.

- fing drawings, in whichble sleeve E, provided withscrew-threads will be evident that by reason of the contrac- -New York, haveinvented certain new and `useful Improvements in Fountain-Pens, of

the writing fluid without detaching the oint- 2, a modified form-of the filler; Fig. 3, lan

. of lvent-chamber and cap.

UNITED ysTAr f its PATENT OFFICE.

JOHN R. `ROBINSON, 'OF ELM-IRA, NEW YORK.

' FOUNTAIN-PEN. i

T0 a/Zwhom it may concern:

Be it known that I, JOHN R; ROBINSON, av citizen of the United States, residing at Elmira, inthe county of Chemung and State of which the following is a specification. r

' This invention relates to improvements in penholders wherein a barrel for containing a` writing Huid is provided-at one end with a pen and with rmeans for feeding the iiuid from the barrel tothe pen.

The object lof my invention as herein set forth is to provide means for regulating the@ admission of air to the top of the barrel to conform with the adjustment of the feed at the pen-point, and, further, to provide a iilling device which may be carried attached to the holder or may. bev detached therefrom and whereby the barrel maybe charged with section and without fear of soiling the gers or spilling the fluid. f

I attain my objects'by-arrangingand asf semblingl the several vparts of the penholder in the manner illustrated in the accompany Figure `1 represents a longitudinal. sectionA improvements -upon an Venlarged scale ;y Fig. end; view of the barrel on the line :1: in Fig. ll with the cap K removed, and Fig. a modified form Like letters of reference designateL like parts in the several views.

The body of the penholder, as described yin my said copendin ap lication, consists of a barrel A, made of ar rubber or otherl suitable material andforming a reservoir for the writing fluid. Into one end `of this barrel is screwed the point-section B, lwhich is provided with a longitudinal. duct or passageway F, adapted to receive the feed-bar C, and with a socket to receive the pen D. Within the outer end of the point-section is a revoluadapted to receive corresponding screwthreads cut upon the outside of feed-bar 0. To ad'ustthefeed, the sleeve E is turned in one direction or the other, thereby moving the feed-bar C toward or away from the point l of the\pen. As the `feed-bar is retracted it tionat the inner end of the duct F` the pasabove the iiuid` in sage-way for the iiuid from the barrelto the Spe'cication of Letters Patenti f Ratented March 13, 1906. Application filed September 18,1905'. Serial Ilo.278,331. v l l pen will be graduallyconstricted. By this arrangement of the feedbar and the gradu ally-constricted Huid-conduit a double adjustment for the flow of ink to the pen is attained, since it will be evident that as the end of the 1feed-bar is advanced nearer the point of the pen (which naturally causes the ink to flow more freely from the lips) the passage-way through the channel F willalso be increased in size, thereby admitting a larger supply of ink to said channel .to meet the de.- mand at the point of the pen. As the 4feedbar is moved inward or Aaway from the point of the pen the passage-way through thechanlnel F will be reduced in size, thereby causing a lessened delivery of the inkto the pen in conformity with thelessened demand. In order that the ink may flow vfrom the barrel. readily and inconformity with any ad? j ustment with the feed-bar, I provide means at the top of the barrel foradmitting -air Iro ortion tothe iiow of the ink through tfie feed. To accomplish this adjustabillty in the air-vent, I construct the barrel with a diaphragm I-I near the uper end, through which pass a number of liol'esI around a central conical plug J. A

` screw-cap K is fitted into the end `of the barl rel beyond the diaphragm and is provided with a central conical bore tol iit the plug. `A central. longitudinal hole passes from this conical bore to the topr of the cap, and it will be evident that air passing through this opening will be` admitted tothe top of the barrel throughlthe holes I to a greater or less degree, depending upon the osition of the' cap K vVsith relation to the p ug J. When the cap is screwed intoclose en a ement with the p plug, the air admission wi l e entirely closed off, and by turning the ca vslightly a very small amount of'air may e admitted, the.

quantity increasing with thefdegree of rotation imparted to the cap.

The central'hole in the cap K is preferably screw-threaded,land into said hole 1s screwed lTOC) the stem of a second cap L, having a central boreA provided with aseries of transverse ventyopenings M. As so arranged, the amount o f` 'air admitted into the first cap. K through the second cap L is regulated by the number of holes M exposed by screwing the latter cap' outward, and the amount of' air admitted to the barrel is in 4turn regulated, as ab'ove stated, by -the adjustment of the iirst cap with respect to the plug. J. By the use of l these two caps, therefore/ the amount of air l the air contained in the bulb N.

admitted to the barrel can be regulated to a very fine degree.- If desired, however, the cap L may be dispensed with when using the pen, the vent adjustment being accomplished entirely through the cap K.

For filling the penholder with writing fluid I extend the central bore completely through the cap L and attach to said cap a rubber bulb N, as shown in Fig. 1, and to protect the parts as so arranged, especially the bulb N, I may provide a cap O, which will be retained in place upon the barrel except when adjusting the air-vent or when filling the pen. This capl is provided at P with an air-vent by which air is admitted around the bulb to the holes M in the cap L.

To fill the pen, the cap L will be screwed out sufficient y to give a vent for expelling he ca K will be screwed intight and the bulb wil be com ressed to expel the air therefrom, after whic the cap L will be screwed in to close 'the vent-holes and the cap K will be screwed .v out to place the bulb in communication with the barrel ofthe holder. The pen will then be placed with the lower end of the feedbar Cin the ink, and the bulb will be allowed to expand, thereby causin the ink to be drawn into the barrel. If t e bulb does not fill the barrel at one operation,by again unscrewing cap L, closing cap K, and .compressing the bulb the air may be expelled from the bulb without driving the ink from the barrel, and more ink can be drawn into the barrel upon properly readjusting the caps and again expanding the bulb.

Instead of using a collapsible rubber bulbl for the filler I may substitute on the cap L a cylinder, such as shown at Q in Fig. 2, provided-with a piston R, adapted to be operated by means of a button S, attached to the end of the piston-rod which passes out from the end of the cylinder, the ink being drawn into the barrel of the pen by reciprocating the piston after adjusting the vents through the screw-threaded stem of the cap L andthe capK in the sameV manner as described in connection with the bulb-filler. With this cylinder-and-piston filler the protecting-cap O will not necessarily be required.

'It will be understood that either form of filler may be detached from the penholder except when filling the reservoir, and a cap with a solid head, such as shown at L in Fig. 4, may be substituted for the filler-cap. The point-section of the holder in Fig. l is shown protected by Aacap G, and' this cap may be transferred to the other end of the holder in using the pen without the filler attachment, as in fountain-pens now, in common use.

In order to provide against filling the reservoir of the penholder to overflowing, I may insert a valve at the upper end of the holder, whereby the air-passage to the filler will be shut off and the suction of the ink into the holder stop ed when the reservoir becomes full. different construction of the holder ventcaps, as illustrated in Fig. 4, wherein a chambered capTis shown attached to the end of the barrel A above the diaphragm K', formed at the end thereof. This chambered cap T is provided at U with a central orifice communicating with a conical bore V, into which 'fits a plug X, projecting downwardly from the vent-ca W. This vent-cap is provided at the topwit a central screw-threaded bore to receive the cap L, said central bore communicatingthrough the plugXwith the conical bore V by way of the air-ducts Y. Within the chambered cap T, I rovide a ball-valve Z of material which will oat in the writing fluid. As the ink is drawn up. by the filler into the cap Tthrough the assages I in diaphragm H the valve Z will F res onding valve seat formed below the ori ce U, so that when the reservoir becomes completely filled with ink no more ink can be drawn beyond Isaid orifice and into the passages in the vent-cap. To prevent the ink from fiowin out throu h the vent-caps when they are legt o en an the holder is turned upsidev down, provide in the chamber T a second weighted ball-valve Z', which as the holder is turned over will change places with the float-valve Z and close the orifice U against the outflow of the ink when the holder is upside down.

For t -s purpose I provide a slightly-A e floated up into a coradjustment of the feed may be attained to conform with different requirements in writing, and the ink will flow to the last drop in the barrel.` Any form of adjustment for the flow of ink to the pen in the point-section may be used in connection'with my vent and filler device, and other variations in the ventcap and valve device may be provided without departing from the spirit of my invention.

What I claim as my invention, and desire to secure by Letters Patent, is-

1. In a fountain-pen, the combination, with the barrelfof an adjustable vent com prising a Cperforated diaphragm adj acentv the upper en of the barrel, a screw-ca having a central bore closing the end of the arrel and adapted to adjust the passage-way for air to the diaphragm, and a second cap having a screw-threaded stem inserted in the central bore of the first cap, said stem having a central lbore with one or more transverse ventopenings leading thereinto.

2. In a fountain pen, the combination, with the barrel, of an adjustable vent-cap closing the upper end of the barrel and having a central screw-threaded bore, a second cap centrally bored and having a transversely perforated screw threaded stem adapted to be inserted in the first cap, and a filler device attached to said second cap.

IOO

IIO

3. In a fountain-pen, the combination, with the. barre1, cfa filler device, a vented stem pro]ecting from the ller device and entering the rear end of the barrel, said stemv being adapted to open the ller to the atmosphere when air is to be discharged there,- frol, and a valve in the barrel adapted to c lose communication between the barrel and filler When the ventV is open.A

4. In a fountainpen, thecombination,

With thebarrel, of a valve-'chamber at the 5. In a fountain pen, the combination with the barrel, of a valve-chamber at the rear end thereof communicating with the barrel and provided with an orice at its outer end, a float-valve and-a weighted valve in said chamber adapted to c'lose said orice according to'the osition in which the pen is held, an adjusta le vent-cap fitted to the Iouterend of said chamber, and a filler device adaptdto be attached to said cap.'

. In testimony whereof I -have aHXed my signature in presence of two Witnesses.

lJOHN R1. ROBINSON. Witnesses;

J. H. OBRIEN, A. S. DIVEN.` 

